> For the complete documentation index, see [llms.txt](https://vaccine-docs.pathcheck.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://vaccine-docs.pathcheck.org/specification.md).

# QR Credential Specifications

- [Trifold Card Design](https://vaccine-docs.pathcheck.org/specification/cdc-folding-card.md): Selective Disclosure of Verifiable Credentials on Paper